We look at the division of 257439 by 66 
We want to divide 257439 by 66.

On to step 1:
If we divide 2 by 66, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 66

Advancing to step 2:
66 can be fit into 25 0 times, resulting in a remainder of 25.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 25 leaves us with 25.
Grab the next digit (7) from the dividend, add it to 25, then carry on: 257 / 66

Let's proceed to step 3:
The number 66 fits into 257 3 times, leaving a remainder of 59.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we take 198 away from 257, we end up with 59.
Append the next digit (4) from the dividend to 59 and continue with: 594 / 66

Advancing to step 4:
66 can be fit into 594 9 times, resulting in a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
If we take 594 away from 594, we end up with 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 66

On to step 5:
When dividing 3 by 66, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 390.0
Subtract 0 from 3 to get 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 66

Moving on to step 6:
The number 66 fits into 39 0 times, leaving a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 3900.0
If we take 0 away from 39, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 7:
The number 66 fits into 390 5 times, leaving a remainder of 60.
Record the quotient 5 as the next digit in the result. 
Result so far: 3900.5
If we take 330 away from 390, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 8:
66 can be fit into 600 9 times, resulting in a remainder of 6.
Use 9 as the next digit of our solution. 
Result so far: 3900.59
If we subtract 594 from 600, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 9:
The number 66 fits into 60 0 times, leaving a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 3900.59
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 10:
When dividing 600 by 66, we get 9 with a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 3900.5909
Subtracting 594 from 600 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 11:
66 can be fit into 60 0 times, resulting in a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 3900.5909
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 12:
66 goes into 600 9 times with a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 3900.590909
If we take 594 away from 600, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 13:
The number 66 fits into 60 0 times, leaving a remainder of 60.
The next digit of our result is 0. 
Result so far: 3900.590909
Deduct 0 from 60 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 14:
66 can be fit into 600 9 times, resulting in a remainder of 6.
The next digit of our result is 9. 
Result so far: 3900.59090909
The remainder is 6 after subtracting 594 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

In conclusion, the division gives 3900.59090909 with a balance of 6e-09.